Cover-all bottle cap



aw 2,1933 R. N. ST A wowm COVER-ALL BOTTLE CAP Filed Nov. 5; 1950 BJ/ZWWZ Patented May 2, 193d *ITED' STA TES PATENT OFFIC BUY 131'. STEWART, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR T0 AMERICAN DAIRY SUPPLYCQMPANY, OF WASHINGTON, DISTRICT OF COLUMBIA, A CORPORAQ TION 01? WE COVER-ALL Application filed November This lnvention relates to closures for milk bottles or the like and belongs to the type which may be termed cover-all caps, as it is the purpose of such articles to cover the mouth or so-called pouring lip of the-bottle to prevent the contamination thereof by reason of general exposure.

The object of this invention is the production of a cap of the character stated, having parts of special construction and arrangement whereby it is believed greater resistance to distortion or colla sing of the part which enters the mouth 0 the bottle is attained, and WltllOllt interfering in any manner with the feeding of thecaps in capping machines. Such caps are ordinarily made of paper or pulp board moistened and formed and treatedwith molten wax. It is to be understood in this application thatno.

limitation is intended either as to the material, the size or to the processes followed. The applicant holds himself free to employ any known method of making bottle caps now commonly public and used.

The special construction constituting this invention is illustrated in the accompanying drawing, of which Fig. 1 represents the mouth of a milk bottle in section having this invention applied thereto. Fig. 2 is a top View of what is termed the inner portion in this description. Fig. 3 is a bottom or interior view of the parts shown in Fig. 2. Fig. 4 is an edge tion much enlarged to show the double ended outer and inner corrugations of the edge. Fig. 5 is a sectional viewtaken on the broken line 5-5 of Fig. 4. Fig. 6 represents the parts illustrated in Fig. 4 with the external cover portion of the cap applied and the flanges or skirts of the inner and outer portions somewhat compressed. I

Throughout the drawing the same numher is used to refer to the same part.

Considering Figs. 1, 2 and 3, the bottle 1 has the usual pouring lip 2 and internal seat view of the inner por-v BOTTLE ear 5, 1930. Serial No. 493,599.

3 for the cap. As manufactured. when the milk bottles are taken from the molds While hot and permitted to stand, the vertical wall 4 extending upwardly from the cap seat 3 becomes slightly bulged at the top, but that result is rather to the advantage than other- Wise of caps made in accordance with this invention in their operation and acts to additionally resist their displacement. In us ing these caps it is found that an attempt to lift the cap directly from the top of the bottle is strongly resisted, but that by. giving the cap a turning or twisting movement it can be readily taken olf by hand and replaced. No implement or skill is demanded.

The external or cover portion .5 has a depending flange or skirt 6 extending downwardly to the pouring lip or'as far as may be desired. Skirt 6 lies against the like skirt of the inner portion of the cap and as shown in Fig. 1 the'skirt of" the'inner portion may be shorterthan theexternal skirt 6 to avoid any-interference in feeding the caps rapidly in a suitable machine. In the manufacture of the caps in quantities some pressureis applied 'to. finally compress the outer and inner portions fully together as e required, and such pressure acts also to smooth the lower circumferential edge of the skirt 6 and the caps are found to feed "freely and easily in the capping machine without interruption.

-The inner portion of the cap asillustrated in Figs. '2 and 3, has acircular depression bounded outwardlyby the vertical wall-7, at the bottom of which is an annular part 8 which may be termed the bottom of the cap. The central part spaced from the Wall? is a frusto-conical pedestal or raised portion 9, and as shown in Fig. 1 the top of the pedestal centrally supports the cover 5. It is believed that. the slanting walls of the cone center of the inner portion and the spacing of the same from the vertical wall 7 as set forth, prevents the collapsing or distortion of the wall 7 when the cap is forced into a milk bottle and the wall 7 engages the wall 4; of the bottle. When the cap is placed on a bottle, the wall 7 is very firmly pressed against the wall A and the construction of this invention efiectually withstands such pressure.

Considering Figs. 4, 5 and6, recesses 10 are formed in the edge 11 of the enlarged inner portion of the cap as shown, and the recesses 10 have lateral extensions 12 by reason of the double ended outer and inner corrugated construction, illustrated. In Fig. 5 it is shown that that bottom of the outer edge recesses 10 are deepest at the edge and slant outwardly to the rim of the inner portion. Now, if the cover 14 like cover 5 is placed over the inner portion and the whole suitably compressed, a key extension 15 will be forced into the recess 10 and locked therein by further pressure. Therefore, the two portions of the cap not only adhere, but are actually looked together by the construction described.

The operation or application of this invention to milk bottlesis the same as that employed in common practice, the invention in this case comprising the structure described.

Having now explained this invention, I claim 1. A cover-all bottle cap, comprising an integral inner portion having a dependent peripheral skirt, a vertical wall spaced from said skirt annularly, a central pedestal having the form of a truncated cone with a flat top, the base of the cone being circular and integral with said .wall whereby the said wall is stiiiened and supported against collapsing when said wall is pressed into the mouth of a milk bottle, and an external cover portion surrounding said skirt and passing over said inner portion, the middle of said cover resting upon the top of the said cone.

2. A cover-all one piece inner peripheral skirt, spaced having the form of a truncated cone with a flat top, the base of said cone being less in diameter than said wall and integral therewith whereby there is formed an annular bottom to said inner portion, said vertical wall and cone and said annular bottom forming a hollow annular rib whereby said bottle cap comprising a a vertical wall annularly Wall is stiffened and supported against collapsing when pressed into the mouth of a milk bottle, and an external cover portion surrounding said skirt and passing over said inner portion, the middle of said cover resting upon the top of said cone.

3. A cover-all bottle cap having a one piece inner portion provided with a depending portion having a dependent from said skirt, a central pedestal outer skirt and a part constructed to enter and to expansively engage the mouth of a milk bottle, said part comprising a vertical circular wall spaced from theskirt and a central pedestal having a base of greater In testimony whereof I afiix my signature.

ROY N. STEWART. 

